- Conatumumab and chemoradiotherapy: Beginning 14-42 days after the last course of induction therapy, patients undergo 3-dimensional radiotherapy once daily, 5 days a week, for 5½ weeks (28 treatments). Patients also receive conatumumab IV over 30-60 minutes on days 1, 15, and 29 and oral capecitabine twice daily, 5 days a week, for 5½ weeks.